Hitachi YUTAKI S COMBI Series Installation And Operation Manual

18
PMEN0645 rev.0 - 04/2023
4
R32 HYDRAULIC WORKING RANGE
WORKING RANGE
4.3 R32 Hydraulic working range
4.3.1 Hydraulic data
MODEL
1.5HP
2.0 HP
2.5 HP
3.0 HP
Minimum water ow rate (*1) m
3
/h 0.5 0.5 0.6 0.6
Maximum water ow rate (*1) m
3
/h 1.8 1.8 1.9 1.9
Minimum installaon water volume (*2) l 28 28 28 28
Minimum allowable water pressure MPa 0.1 0.1 0.1 0.1
Maximum allowable water pressure MPa 0.3 0.3 0.3 0.3
(*1): Values calculated based on the following condions: Water inlet/outlet temperature: 30/35°C, Outdoor ambient
temperature: (DB/WB): 7/6°C.
(*2): Values calculated with an ON/OFF temperature dierenal value of 4°C.
4.3.2 Pump performance curves
 NOTE
If a water ow rate is selected out of the working range of the unit, it can cause malfuncon on the
unit. Please, try to operate the pump within the minimum and maximum water ow of the indoor
unit.
1.5 HP-2.0HP
2.5 HP-3.0HP
Stac pressure (mwc)
0
1
2
3
4
5
6
7
8
0.00.5 1.01.5 2.02.5 3.0
Stac pressure (mwc)
0
1
2
3
4
5
6
7
8
0.00.5 1.01.5 2.02.5 3.0
Water ow (m
3
/h) Water ow (m
3
/h)

Hitachi YUTAKI S COMBI Series Specifications

General

Type	Air-to-Water Heat Pump
Energy Efficiency Class (Cooling)	A++
Refrigerant	R32
Operating Temperature Range (Heating)	-20°C to 35°C
Energy Efficiency Class (Heating)	A+++
Integrated DHW Tank	190 liters
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Weight (Indoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Operating Temperature Range (Cooling)	+10°C to +46°C